Patents by Inventor Xunce Zhou

Xunce Zhou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11372573
    Abstract: A method, computer program product, and computer system for receiving, at a computing device, a write request from a host, wherein a first portion of a process may receive the write request. A callback and context may be set in the write request by the first portion of the process. The write request may be passed to a second portion of the process. The first process may be provided with the context. The first process may use the context to replicate the write request data to a destination.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: June 28, 2022
    Assignee: EMC IP HOLDING COMPANY, LLC
    Inventors: Alan L. Taylor, Michael C. Brundage, Nagapraveen Veeravenkata Seela, William C. Davenport, Xiangping Chen, Xunce Zhou
  • Patent number: 11269776
    Abstract: Techniques for providing a direct IO path to compressed data on storage media of a storage system. The techniques include triggering a transaction cache to perform a flush operation for updating mapping metadata for a storage object containing the compressed data. Having updated the mapping metadata for the storage object, the techniques further include issuing, by a copier module, an IO read request for the compressed data of the storage object to a namespace layer, which issues the IO read request to a mapping layer. The techniques further include forwarding the IO read request to a logical layer of the mapping layer, bypassing the transaction cache. The techniques further include reading, by the logical layer, the compressed data of the storage object from the storage media, and providing, via the mapping layer and the namespace layer, the compressed data to the copier module for transfer to a destination storage system.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: March 8, 2022
    Assignee: EMC IP Holding Company LLC
    Inventors: Xiangping Chen, Philippe Armangau, Anton Kucherov, Xunce Zhou, William C. Davenport
  • Publication number: 20220011937
    Abstract: A method, computer program product, and computer system for receiving, at a computing device, a write request from a host, wherein a first portion of a process may receive the write request. A callback and context may be set in the write request by the first portion of the process. The write request may be passed to a second portion of the process. The first process may be provided with the context. The first process may use the context to replicate the write request data to a destination.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 13, 2022
    Inventors: ALAN L. TAYLOR, Michael C. Brundage, Nagapraveen Veeravenkata Seela, William C. Davenport, Xiangping Chen, Xunce Zhou
  • Patent number: 11100018
    Abstract: A method, computer program product, and computer system for receiving, by a computing device, an IO request. It may be determined that data of the IO request includes an indication of an attribute. A prefix descriptor may be constructed for the data in a self-descriptive page buffer based upon, at least in part, determining that the data of the IO request includes the indication of the attribute. An appropriate Application Programming Interface (API) may be called to process the IO request based upon, at least in part, the prefix descriptor.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: August 24, 2021
    Assignee: EMC IP Holding Company, LLC
    Inventors: Xiangping Chen, Xunce Zhou
  • Publication number: 20210124700
    Abstract: A method, computer program product, and computer system for receiving, by a computing device, an IO request. It may be determined that data of the IO request includes an indication of an attribute. A prefix descriptor may be constructed for the data in a self-descriptive page buffer based upon, at least in part, determining that the data of the IO request includes the indication of the attribute. An appropriate Application Programming Interface (API) may be called to process the IO request based upon, at least in part, the prefix descriptor.
    Type: Application
    Filed: October 24, 2019
    Publication date: April 29, 2021
    Inventors: XIANGPING CHEN, Xunce Zhou
  • Publication number: 20210117328
    Abstract: Techniques for providing a direct IO path to compressed data on storage media of a storage system. The techniques include triggering a transaction cache to perform a flush operation for updating mapping metadata for a storage object containing the compressed data. Having updated the mapping metadata for the storage object, the techniques further include issuing, by a copier module, an IO read request for the compressed data of the storage object to a namespace layer, which issues the IO read request to a mapping layer. The techniques further include forwarding the IO read request to a logical layer of the mapping layer, bypassing the transaction cache. The techniques further include reading, by the logical layer, the compressed data of the storage object from the storage media, and providing, via the mapping layer and the namespace layer, the compressed data to the copier module for transfer to a destination storage system.
    Type: Application
    Filed: October 17, 2019
    Publication date: April 22, 2021
    Inventors: Xiangping Chen, Philippe Armangau, Anton Kucherov, Xunce Zhou, William C. Davenport
  • Patent number: 9229656
    Abstract: An improved technique migrating data from a source LUN (logical unit) to a target LUN manages control I/O's in a manner that depends on the current state of data migration and on whether the control I/O's specify that reservation information for a LUN is to be set or queried. Control I/O's specifying reservation settings during the different states of migration are treated the same way as data WRITEs during those respective states, and control I/O's specifying reservation queries during different migration states are treated the same way as data READs during those respective states.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: January 5, 2016
    Assignee: EMC Corporation
    Inventors: Cesareo Contreras, Helen Raizen, Michael E. Bappe, Xunce Zhou
  • Patent number: 8412858
    Abstract: Described are techniques for indicating a state associated with a device. A request is received over a path for information about a device. A response to the request is sent. The response indicates a state regarding the device on the path. The response has a response status of good and a payload of a varying size. The payload is truncated at a location prior to that at which a device identifier for the device is expected. In accordance with the response, a state regarding the device on the path is determined.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: April 2, 2013
    Assignee: EMC Corporation
    Inventors: Cesareo Contreras, Helen S. Raizen, Michael E. Bappe, Ian Wigmore, Arieh Don, Xunce Zhou
  • Patent number: 8316161
    Abstract: Described are techniques for indicating a state associated with a device. A request is received over a path for information about a device. A response to the request is sent. The response indicates a state regarding the device on the path. The response has a response status of good and a payload of a varying size. The payload is truncated at a location prior to that at which a device identifier for the device is expected. In accordance with the response, a state regarding the device on the path is determined.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: November 20, 2012
    Assignee: EMC Corporation
    Inventors: Cesareo Contreras, Helen S. Raizen, Michael E. Bappe, Ian Wigmore, Arich Don, Xunce Zhou
  • Publication number: 20120246345
    Abstract: Described are techniques for indicating a state associated with a device. A request is received over a path for information about a device. A response to the request is sent. The response indicates a state regarding the device on the path. The response has a response status of good and a payload of a varying size. The payload is truncated at a location prior to that at which a device identifier for the device is expected. In accordance with the response, a state regarding the device on the path is determined.
    Type: Application
    Filed: June 11, 2012
    Publication date: September 27, 2012
    Inventors: Cesareo Contreras, Helen S. Raizen, Michael E. Bappe, Ian Wigmore, Arieh Don, Xunce Zhou
  • Patent number: 8190784
    Abstract: An in-band protocol transport carries command-response protocol communications between first and second functional components of a storage input/output (I/O) interface stack, for example to control encryption-related processing of storage I/O commands. A storage read command used as a protocol transport message has protocol data in a read data buffer, and predetermined read address information, such as a prime-numbered starting block address and a small, odd-valued length value, unlikely to occur in normal (non-transport) storage read commands. The second functional component determines that the storage read command contains the predetermined read address information, indicating that the storage read command is a protocol transport message rather than a normal read. For greater confidence, it also determines that the protocol data in the read data buffer includes protocol identification data such as a protocol signature.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: May 29, 2012
    Assignee: EMC Corporation
    Inventors: Helen S. Raizen, Michael E. Bappe, Edith Epstein, Atul Kabra, Cesareo Contreras, Xunce Zhou